Cadaverine is a prime important monomer for development of bio-based nylon 56.The synthesis of cadaverine from low-cost and overcapacity L-lysine is a green and high-value pathway.Efficient and stable catalyst is the key to the chemo-catalytic heterogeneous process for cadaverine.In this work,high dispersion of Ru nanoparticles encapsulated in FAU was synthesized for high catalytic activity.Then,Ru/FAU@S-1 with a shell of the silicalite-1 was synthesized by in situ hydrothermal method to improve stability of catalyst in decarboxylation of L-lysine to cadaverine.In addition,the Ru/FAU encapsulated in all silicon shell had moderate acidity,which was beneficial for the decarboxylation of L-lysine to cadaverine.Finally,the conversion of L-lysine reached 81.5％,and the selectivity of cadaverine reached 65.8％.And,after 5 cycles,there was no significant decrease in catalytic performance of Ru/FAU@S-1.The stability of the catalyst was significantly improved.
关键词
精细化学工程/双蛋壳包裹/钌纳米颗粒/催化脱羧/L-赖氨酸/戊二胺
Key words
fine chemical engineering/two-shell structured/ruthenium nanoparticles/catalytic decarboxylation/L-lysine/bio-based cadaverine
维普
万方数据